Fatal error: Uncaught Error: Class "PHPUnit_Framework_TestCase" not found in C:\xampp\htdocs\OLD\OLD 15 03 2025\vendor\mercuryseries\flashy\tests\FlashyTest.php:6 Stack trace: #0 {main} thrown in C:\xampp\htdocs\OLD\OLD 15 03 2025\vendor\mercuryseries\flashy\tests\FlashyTest.php on line 6